65 Formula S brakes

I have finally finished the right side and all is good. The left side has a problem. The emergency brake cable is frozen where it goes into the backing plate. I have ordered one from NAPA, but will not be in till next Tuesday. Anything I should know about replacing the cable?
At least I am making a little progress. Thanks so much for everyones advise.

Old mechanic secret a 1/2 box wrench slides right over the locking clip and the cable pulls right out.